Tramp-related warnings from byte compiler

[Eli Zaretskii]

Are these warnings expected?  At least the "used before defined" ones
look like real bugs to me:

    In tramp-do-copy-or-rename-file-directly:
    tramp.el:3033:36:Warning: reference to free variable `t1'
    tramp.el:3038:27:Warning: reference to free variable `vec'

    In tramp-make-temp-file:
    tramp.el:3580:1:Warning: defsubst `tramp-make-temp-file' was used before it
        was defined

    In tramp-make-tramp-temp-file:
    tramp.el:3587:1:Warning: defsubst `tramp-make-tramp-temp-file' was used 
before
        it was defined

    In tramp-compute-multi-hops:
    tramp.el:5950:26:Warning: reference to free variable 
`tramp-gw-tunnel-method'
    tramp.el:5950:49:Warning: reference to free variable `tramp-gw-socks-method'

    In tramp-file-name-real-host:
    tramp.el:6527:1:Warning: defsubst `tramp-file-name-real-host' was used 
before
        it was defined

    In tramp-file-name-port:
    tramp.el:6535:1:Warning: defsubst `tramp-file-name-port' was used before it
        was defined

    In tramp-find-method:
    tramp.el:6547:1:Warning: defsubst `tramp-find-method' was used before it was
        defined